If you happen to receive an error message while logging in to Ragnarok Mobile using a Facebook account, you might receive an error message that saying “Can’t Load URL: The domain of this URL isn’t included in the app’s domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings.”.
One of the reasons why this error shows up is that you recently made changes to your Facebook account settings, probably you read stuff on the internet on how to protect your privacy from Social media and you disable something. The settings we’re mentioning is the Off-Facebook activity.
So what is off Facebook activity and why it is causing the error? This tool is not just a tracking for your activities outside Facebook, and games like Ragnarok M Eternal Love requires this activity to use the Login SDK of Facebook, without it you cannot use Facebook as a login for the game. If you found site that you’re visiting appears in this section, it is because they’re using either the Facebook pixel an traffic analytics which tracks your activity from that site, embed code of Facebook like videos, share, likes and other thing. This features will not harm your privacy because Facebook only knows those data, except for those Fb login that you authorize to share your information.
How to Fix Facebook Login Error
In order to fix this error, you need to re-enable back the settings you just disabled in Off-Facebook activity.
And find the Ragnarok M Eternal Love, and enable it back.